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Wilda/22, zfflw 6/" United States Patent BALER William J. Dwyer, BattleCreek, Mich., assignor to I. I.

Case Company, Racine, Wis., a corporation of Wisconsin Originalapplication January 13, 1950, Serial No. 138,507,

now Patent No. 2,733,652, dated February 7, 1956. Divided and thisapplication October 16, 1953, Serial No. 392,822

11 Claims. (Cl. 100-22) The present invention relates generally tobalers and more particularly to an improved baler for agricultural use,which includes means for automatically tying the baled material withwire.

The baling of crop materials may be accomplished either in the fieldwith a pick-up baler which is operable to gather a windrowed crop and toform it into bales or at a central location with a stationary baler, thematerial to be baled being hauled to the stationary baler for the balingoperation. In conventional balers of either the stationary or thepick-up type, the material being baled is fed into an elongated chamberin which a reciprocable baling piston is disposed. The baling piston isdriven from a suitable source of power, and during the operation of thebaler, the piston compresses the hay or other material being baled andforces that material longitudinally of the chamber to a dischargeopening. The baling chamber is, in effect, continued beyond thedischarge opening by a skeletonized frame or bale case which ispreferably constructed in such manner that the crosssectional areathereof may be varied to change the amount of force required to move thecompressed material therethrough, thereby providing means forcontrolling the density of the compressed material. The compressedmaterial in the baling chamber and in the bale case-is in the form of acontinuous column or strip which is divided into units of the desiredlengths to form bales before the compressed material passes out of thedischarge end of the bale case. After the compressed material is dividedinto bales, but before the material is discharged from the bale case,one or more ties are placed around each bale to bind it together so thatthe shape of each bale will be retained as it passes out of the balecase. The bale ties may be applied by automatic mechanism or by hand.

Both wire and twine have been used for bale ties, although wire is moresatisfactory because twine often breaks when subject to the mechanicalstrains incident to handling the bales, or becomes so weakened due todeteriorationunder storage conditions that the compressed materialitself bursts the ties. Despite these disadvantages, twine is used inmost commercially available automatic tying mechanisms chiefly becausetwine is highly flexible, and this simplifies greatly the constructionof automatic bale tying mechanism. In fact, due to the complexity andhigh initial and maintenance cost of known apparatus for tying ortwisting stifi wires, economic considerations have required that wirebaling ties be tied or twisted manually. quite expensive, and as aresult, there is a great need in the art for a relatively simple andreliable automatic mechanism for applying wire ties to bales of cropmaterials.

This problem of properly tying bales is particularly critical in thecase of baling mechanisms which compress the crop material in separablelayers. In baling mechanisms of this character, the baling piston orplunger is provided with a cutter knife or cutter knives which sever thematerial compressed on each stroke of the piston from Manual tying withwire is, however, 1

the uncompressed material being fed into the baling chamber. Since thisresults in but a superficial interconnection between the layers ofmaterial compressed on successive strokes of the piston, the finishedbale must be held under a substantial compressive force by the ties ifthe bale is to maintain its shape. Further, in a pick-up baler the balesare usually dropped onto the ground from a height of several feetincident to the operation of the baler, and as a consequence, unless thebales are securely tied, the resulting shock often breaks the bale ties.

Accordingly, the principal object of the invention is the provision ofan improved baler which will overcome the deficiencies of the prior artdevices. A further object of the invention is the provision of animproved pick-up baler which forms the baled material into separable,compressed sections and which is operable to tie these sections withwire in a manner such that the bales will with stand the stressesincident to handling and storing the bale. More specific objects of theinvention are the provision of improved means for, feeding one or morecontinuous wires around a bale, the provision of improved means forinterconnecting the wires to form bale ties, the provision of improvedmeans for cutting the wires after the bale tie is formed, and theprovision of means for driving and synchronizing the foregoing elementsto effect smooth and rapid tying. Other objects and advantages of theinvention will become known by reference to the following descriptionand the accompanying drawings of one preferred embodiment thereof.

In the drawings:

Fig. l is a plan view of a baler embodying various features of theinvention;

Fig. 2 is a fragmentary, perspective view showing the forward end of thebaler illustrated in Fig. I, particularly illustrating the arrangementof the timing and synchronizing mechanism which constitutes an importantpart of the illustrated apparatus;

Fig. 2a is a sectional view taken on line 2a-2a in Fig. 2;

Fig. 3 is a fragmentary, elevational view, partially insection, showingparticular features of the mechanism illustrated in Fig. 2;

Fig. 4 is a sectional view taken on line 4-4 in Fig. 3;

Fig. 5 is a sectional view taken on line 5-5 in Fig. 4;

Fig. 6 is a fragmentary, plan view of the means employed for carrying acontinuous wire around the bale;

Fig. 7 is a fragmentary, perspective view showing means for feeding thecontinuous wire to the mechanism illustrated in Fig. 6;

Fig. 8 is a sectional view taken on line 8-8 in Fig. 6;

Fig. 9 is a sectional view taken on line 9-9 in Fig. 8;

Fig. 10 is an end view of the needle which comprises a part of themechanism illustrated in Fig. 6;

Fig. 11 is a perspective view of the bale case which constitutes a partof the baler illustrated in Fig. 1. This view particularly illustratesthe means employed for supporting the tying mechanism on the bale case;

Fig. 12 is a perspective view showing improved mechanisms for tying thebaling wires and for holding and cutting wires;

Fig. 13 is a fragmentary, elevational view of the mechanism illustratedin Fig. 12;

Fig. 14 is a sectional view taken on line 1414 in Fig. 13;

Fig. 15 is a sectional view taken on line 1515 in Fig. 13;

Fig. 16 is a sectional view illustrating the driving means for the wireholding and clamping unit illustrated in Figs. 13 and 15;

Fig. 17 is a sectional view takenon line 17-17 in Fig. 16;

